Connection issues on a windows VPS are driving me up the wall

[Arizard]

So here's the situation

My windows VPS runs 4 gmod servers and 1 teamspeak server. Normally, players can connect fine and play for an extended period of time. Recently, they have not been able to do this. All players will be booted off the connection (resulting in them timing out) and then barred so that they can not see the server from the server browser. Pinging the server on their end will come up with no response.

What makes it even weirder? This does not affect me or my Bunny Hop server superadmin. We are the only two players who remain unaffected by this connection issue, as if we are whitelisted or ignored somehow.

Any thoughts on what this cause could be? Has anyone experienced anything similar? My first assumptions were DDoS Protection detecting false positives, but why does it consistently ignore myself and my superadmin?

Only recent changes I have made is installing UGCC (requiring installation of .NET 3.5 and IIS). Running the servers through UGCC or manually with a .bat file does not change the problem at all, and this problem also started before I had installed UGCC, therefore I don't believe that UGCC and it's dependencies are the root of the problem.

Task manager also shows network usage never going above around 7% (max 10gbps apparently)

Occasionally, the client will also crash and their hl2.exe will close with no error. Not sure if this is attributed to the above problem but it has also frequently started happening at the same time as the connection issues.

Many thanks

[GreenGold]

Have same problem on ttt server random people dont see server in list but server is online and working, are you using nitros newtorks?

[Arizard]

I am not using nitrous networks

[Tyler B.]

I've been having the same issue on both of my servers - except it's random who disconnects each time. Probably a problem in the windows client, since I'm running my servers on an Ubuntu VPS.